Interference Rejection Based Maximum SINR Pre-Filtering For Multiuser Detection In An LTE Uplink

摘要

Methods and systems for applying a multi-path, maximum SINR, pre-processing interference rejection filter to an interference-limited signal received from a plurality of users in a wireless network operating according to the Long Term Evolution (“LTE”) standard includes receiving raw data, including training data from a plurality of users, selecting at least one modeled user, subtracting a contribution of the modeled user(s) from the training data to form a residual training signal, forming an interference rejection covariance matrix from the residual training signal, whitening the raw data using the interference rejection covariance matrix, and equalizing the whitened received data. In embodiments, an estimated contribution of a subset of the modeled users is subtracted from the raw data for filtering in a subsequent turbo loop. The subset can be selected based on an estimated post-combined SINR, an estimated outage capacity, or an estimated multiuser efficiency of the received data.